From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 0C9A2C6FA82 for ; Sat, 10 Sep 2022 09:11:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Subject:Cc:To:From:Message-ID:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=2+K2rR71nsWTlQv+G2quGwGTq1K4eSQUgbcGCHiVXd4=; b=l2RWMTNPwymjiz IEw9HQNd6EbsJWuEmX6YWh8xH/2j4gjfiwHVsvGuGPksYzY7H6bNzSehd16/j1UsJGkACADoxnRYD G7sN+8vKR3YmH+yFo4ndcD6jqA/afOEh8G/J43SmafclNjf0ndP2VQceYOsr504O3qTitbiymyIxj PaCTmIXtEx9WD1jnky8IjnLtweJ30BKmXCeuqVPAdYAD5xegG6jhUjvWr0y1aXf2iDp/9jnI6GLP9 t7nQKdXBcz30fxCgKue0SRfllWeZQazTid4PTug36ozNf9eev/Mx/+1ViD6duJayb7JvrlzgGu4YR kfEfFv/mGo4tXh/XIF0A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oWwUW-008pFc-Ja; Sat, 10 Sep 2022 09:09:32 +0000 Received: from sin.source.kernel.org ([145.40.73.55]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oWwUT-008pAh-DT for linux-arm-kernel@lists.infradead.org; Sat, 10 Sep 2022 09:09:31 +0000 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by sin.source.kernel.org (Postfix) with ESMTPS id 98046CE08D0; Sat, 10 Sep 2022 09:09:22 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D2596C433C1; Sat, 10 Sep 2022 09:09:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1662800960; bh=RBTEOuGRLzNZfi5Rv1YAEAy4+shLaNRM/hNJR+C8rVc=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=MSVfrspXN74VRKeCbl/TKK3UBdgCUkDzyvp05cX+CrkWoT1JZwfv0Yxoww6x9lcTf 2ZebxrmfFmK5l4yDemqiOtdRH30Gjbx2bmj1NCCBzY/NBP1AURPMAVGL6+ZxE6Vk/a u2MB/j+PHPMu4tGRr+y/2DXBE13HsVobL5uW3yOilcMaO+T+n0wFUzYbO6SZJaFD/X +I4MB9FSg5DQOl91Hq0xv68StTNgkuUb1rK/Z++xqy7O5HIT2xiLm3c+frRup5gjTJ KbYwXaYNgTwePuU06t29YO+kbplCQz9MFB/rvHfKCqzp5T5p2zfFnymTDV+TeI3jDO 0sARXOMFDsndg== Received: from sofa.misterjones.org ([185.219.108.64] helo=wait-a-minute.misterjones.org) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.95) (envelope-from ) id 1oWwUI-009Nkm-Ir; Sat, 10 Sep 2022 10:09:18 +0100 Date: Sat, 10 Sep 2022 10:09:31 +0100 Message-ID: <878rmrr3xw.wl-maz@kernel.org> From: Marc Zyngier To: Elliot Berman Cc: Catalin Marinas , Will Deacon , James Morse , Alexandru Elisei , "Suzuki K\ Poulose" , , , Subject: Re: [PATCH v2] KVM: arm64: Only set KVM_MODE_PROTECTED if is_hyp_mode_available() In-Reply-To: <05057e2a-1a85-69ba-ffcd-584d4090467a@quicinc.com> References: <20220909144552.3000716-1-quic_eberman@quicinc.com> <05057e2a-1a85-69ba-ffcd-584d4090467a@quicinc.com> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM-LB/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL-LB/10.8 EasyPG/1.0.0 Emacs/27.1 (x86_64-pc-linux-gnu) MULE/6.0 (HANACHIRUSATO) MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: quic_eberman@quicinc.com, catalin.marinas@arm.com, will@kernel.org, james.morse@arm.com, alexandru.elisei@arm.com, suzuki.poulose@arm.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kvmarm@lists.cs.columbia.edu X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220910_020929_844295_AF607038 X-CRM114-Status: GOOD ( 26.41 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Fri, 09 Sep 2022 18:55:18 +0100, Elliot Berman wrote: > > > > On 9/9/2022 10:28 AM, Catalin Marinas wrote: > > On Fri, Sep 09, 2022 at 07:45:52AM -0700, Elliot Berman wrote: > >> Do not switch kvm_mode to KVM_MODE_PROTECTED if hypervisor mode is not > >> available. This prevents "Protected KVM" cpu capability being reported > >> when Linux is booting in EL1 and would not have KVM enabled. > >> > >> Signed-off-by: Elliot Berman > >> --- > >> arch/arm64/kvm/arm.c | 4 +++- > >> 1 file changed, 3 insertions(+), 1 deletion(-) > >> > >> diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c > >> index 8fe73ee5fa84..861f4b388879 100644 > >> --- a/arch/arm64/kvm/arm.c > >> +++ b/arch/arm64/kvm/arm.c > >> @@ -2272,7 +2272,9 @@ static int __init early_kvm_mode_cfg(char *arg) > >> return -EINVAL; > >> if (strcmp(arg, "protected") == 0) { > >> - if (!is_kernel_in_hyp_mode()) > >> + if (!is_hyp_mode_available()) > >> + kvm_mode = KVM_MODE_DEFAULT; > > > > I think kvm_mode is already KVM_MODE_DEFAULT at this point. You may want > > to print a warning instead. > > > > Does it make sense to print warning for kvm-arm.mode=nvhe as well? In general, specifying a kvm-arm.mode when no hypervisor mode is available should be reported as a warning. Thanks, M. -- Without deviation from the norm, progress is not possible. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel